Check out https://new.iris.to for a ReplyGuy-free Nostr experience. When logged in, it hides replies from people who are not in your social graph. You can display the hidden messages by clicking on the button underneath.
 https://image.nostr.build/62e5c3558a5e73ccf98611f16cc3b726b9d431e213f33d3cc32e81e066bbd524.png https://image.nostr.build/20e354fe8bdf1a17d3b157d9e8267b8d4888e2af511fb5b93ee0e9e127748b5d.png
https://image.nostr.build/49f1ee71224925bc0804ff525271e94b21e657c21f1cb7635bc18153447c50c3.png

There's also "Adventure" feed for showing all notes from your social graph:

https://image.nostr.build/0d754b8223e03ab64dde6e9368b69bc51e6d18835dc31d94f8f4d1cd19eda17a.png

I have worked on it together with the Nestr "decentralized GitHub" team. Nestr frontend and Iris are built from the same codebase using build configuration options for different branding and features. You can easily extend the configuration to make your own branded version. Source code to be released soon™.

The client is based on NDK. Full SocialGraph up to 2nd degree is downloaded on first login, and thereon only missing follow lists are queried. I'll be experimenting with options to go beyond 2nd degree.

The graph is serialized and saved locally in a compressed format, which is much faster to load than it is to reconstruct the graph from Nostr events. My graph consisting of 260 follow lists and 23000 users is 3 MB on disk.

It's still very much work-in-progress and mostly tested on desktop Brave, but it's already my favorite way to browse Nostr.